US4930612A - Roller track assembly incorporating a mechanical elevator mechanism - Google Patents

Roller track assembly incorporating a mechanical elevator mechanism Download PDF

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Publication number
US4930612A
US4930612A US07/274,961 US27496188A US4930612A US 4930612 A US4930612 A US 4930612A US 27496188 A US27496188 A US 27496188A US 4930612 A US4930612 A US 4930612A
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United States
Prior art keywords
ramp
base member
lift bar
face
roller support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/274,961
Inventor
Robert J. Thorndyke
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Atlantis Transportation Services Inc
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Atlantis Transportation Services Inc
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Publication date
Application filed by Atlantis Transportation Services Inc filed Critical Atlantis Transportation Services Inc
Priority to US07/274,961 priority Critical patent/US4930612A/en
Assigned to ATLANTIS TRANSPORTATION SERVICES INC. reassignment ATLANTIS TRANSPORTATION SERVICES INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: THORNDYKE, ROBERT J.
Priority to CA002003548A priority patent/CA2003548C/en
Application granted granted Critical
Publication of US4930612A publication Critical patent/US4930612A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G13/00—Roller-ways
    • B65G13/11—Roller frames
    • B65G13/12—Roller frames adjustable

Definitions

  • This invention relates to roller conveyor systems.
  • this invention relates to roller conveyors which incorporates an elevator mechanism for raising and lowering the rollers.
  • roller systems which incorporate an elevator system are well known.
  • the elevator system which is commonly used in roller conveyor systems which are mounted on the bed of a truck employs a pneumatic elevator device.
  • These devices have been in use for many years and incorporate an inflatable bladder which when inflated will serve to raise the rollers to an operating position and when deflated will serve to lower the rollers.
  • the rollers are raised and lowered with respect to the floor of a truck or the like in order to facilitate the movement of cargo along the truck when they are in the raised position while permitting the load to rest securely upon the floor of the truck when the rollers are in the lowered position.
  • the problem with the inflatable system presently in use is that these mechanisms are subjected to rugged use in a hostile environment and there is a danger that the inflatable bladder may be punctured because of the exposure to this hostile environment.
  • an elevating roller track assembly comprises a base member having first and second ends, a longitudinally elongated channel formed in said base member, said channel having a bottom wall, a pair of oppositely disposed side walls and an open upper end, a lift bar located in said channel and slidably mounted on said bottom wall for longitudinal movement relative to the base member, first elevator ramp means on said lift bar, said first ramp means having a first ramp face which is inclined upwardly toward the first end of the base member, a roller support member slidably mounted in said channel for longitudinal movement therein, said roller support member having a bottom wall overlying said lift bar, a plurality of load supporting rollers mounted for rotation on and extending upwardly from said roller support member, second elevator ramp means on said bottom wall of said roller support, said second elevator ramp means having a second ramp face which extends parallel to said first ramp face in a face-to-face relationship therewith, drive means for driving the lift bar to and fro with respect to the base member to cause said first and second ramp faces to
  • FIG. 1 is a pictorial view illustrating a van having roller conveyors of the type of the present invention mounted in the floor thereof,
  • FIG. 2 is a pictorial view of a roller conveyor assembly constructed in accordance with an embodiment of the present invention
  • FIG. 3 is an exploded view of the assembly of FIG. 2, and
  • FIG. 4 is a partially sectioned side view of a portion of a roller assembly.
  • the reference numeral 10 refers generally to a roller assembly constructed in accordance with an embodiment of the present invention. As indicated in FIG. 1 of the drawings, the roller assemblies 10 may be positioned on the floor 12 of a van 14 for use in transporting loads into and out of the van.
  • the roller assembly has a base channel member 16 which has a bottom wall 18, a pair of oppositely disposed side walls 20 and flanges 22 which project laterally inwardly from the upper end of the side walls 20.
  • a passage 24 opens through the bottom wall 18.
  • a lifting bar 26 is proportioned to fit in the channel 28 so as to rest in a face-to-face sliding relationship on the bottom wall 18 for longitudinal movement relative to the base member 16.
  • a plurality of first elevator ramps 30 are mounted on the upper face of the lifting bar 26.
  • the ramps 30 each have a ramp face 32 which is inclined upwardly toward one end of the lift bar.
  • a roller support member 34 is provided in the form of a U-shaped channel member 36 in which rollers 38 are mounted for rotation so that an arcuate portion of the periphery of each roller 38 will project above the upper edges 40 to the channel member 36.
  • a plurality of second elevator ramps 42 are mounted on the underside of the channel member 36.
  • Each of the ramp members 42 has a second ramp face 44 which extends parallel to the first ramp face 32 of the first ramp members 30.
  • the roller support member 34 with the second elevator ramps 42 attached thereto is mounted in the channel 28 so that the second ramp members 42 rest on the lift bar with the ramp faces 44 arranged in a face-to-face relationship with respect to the ramp faces 32.
  • a cover 46 is formed with a plurality of apertures 48 in the upper wall 50.
  • the cover 46 has short side walls 52 which extend downwardly from the top wall and are arranged to overlie the side walls 20 of the face member 16.
  • the apertures 48 are proportioned to permit a segment of each roller 38 to project upwardly therethrough when the roller support member or cage 34 is elevated.
  • end plates 54 which are releaseably attached to the flanges 56 which project laterally from opposite sides of the base member 16.
  • the drive mechanism which is used for moving the lift bar 26 comprises an extensible ram assembly 60 which includes a cylinder 62 and a shaft 64.
  • One end of the cylinder 62 is connected to a mounting bracket 66 which is attached to the underside of the bottom wall 18 of the base member 16.
  • the shaft 64 is mounted in a bracket 68 which is attached to the underside of the lift bar 26.
  • the shaft 64 By extending the ram 60, the shaft 64 will move the bracket 68 to the right of the position shown in FIG. 4 and will thus cause the lift bar 26 to move to the right. As a result, the ramp member 30 will move to the right. This will cause the ramp member 42 to be elevated and this in turn will cause the roller support member 34 to be elevated.
  • the rollers 38 By elevating the roller support member 34, the rollers 38 will be caused to project through the passages 48 to extend above the top face of the upper wall 50 so that they may be used for the purposes of providing a roller conveyor along which items may be conveyed into and out of the load storage compartment of the truck or the like.
  • the extensible ram 60 is reactivated to return the lift bar to the original position shown in FIG. 4 and the rollers 36 are lowered to the level of the upper face of the cover 50 so that they are not functional as a conveyor.
  • the present invention provides a simple and inexpensive form of elevatoring roller track assembly which does not require an inflatable bladder.
  • the roller track assembly is preferably made from metal such as steel or the like.
  • the elevator ramp pads are preferably made from a wear-resistant, low-friction plastics material such as nylon or Teflar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

An elevating roller track assembly having a base member and a lift bar located in a channel which is formed in the base member. The lift bar is slidably mounted for longitudinal movement relative to the base member. A first elevator ramp is mounted on the lift bar. The first ramp has a first ramp face which is inclined upwardly toward a first end of the base member. A roller support member is slidably mounted in the base for longitudinal movement. The roller support member has a bottom wall overlying the lift bar. A plurality of load supporting rollers are mounted for rotation on and extending upwardly from the roller support member. A second elevator ramp is mounted on the bottom wall of the roller support. The second elevator ramp has a second ramp face which extends parallel to the first ramp face in a face-to-face relationship therewith. A drive mechanism is provided for driving the lift bar to and fro with respect to the base member to cause the first and second ramp faces to slide over one another to raise or lower the roller support member and its associated rollers as required in use.

Description

BACKGROUND OF INVENTION
This invention relates to roller conveyor systems. In particular, this invention relates to roller conveyors which incorporates an elevator mechanism for raising and lowering the rollers.
FIELD OF INVENTION
Roller systems which incorporate an elevator system are well known. The elevator system which is commonly used in roller conveyor systems which are mounted on the bed of a truck employs a pneumatic elevator device. These devices have been in use for many years and incorporate an inflatable bladder which when inflated will serve to raise the rollers to an operating position and when deflated will serve to lower the rollers. The rollers are raised and lowered with respect to the floor of a truck or the like in order to facilitate the movement of cargo along the truck when they are in the raised position while permitting the load to rest securely upon the floor of the truck when the rollers are in the lowered position. The problem with the inflatable system presently in use is that these mechanisms are subjected to rugged use in a hostile environment and there is a danger that the inflatable bladder may be punctured because of the exposure to this hostile environment.
SUMMARY OF INVENTION
I have found that it is possible to provide a simple, inexpensive and highly reliable elevator mechanism in a conveyor roller assembly without the need to use an inflatable bladder.
It is an object of the present invention to provide a simple and inexpensive mechanical elevator mechanism in a roller conveyor system.
According to one aspect of the present invention, an elevating roller track assembly comprises a base member having first and second ends, a longitudinally elongated channel formed in said base member, said channel having a bottom wall, a pair of oppositely disposed side walls and an open upper end, a lift bar located in said channel and slidably mounted on said bottom wall for longitudinal movement relative to the base member, first elevator ramp means on said lift bar, said first ramp means having a first ramp face which is inclined upwardly toward the first end of the base member, a roller support member slidably mounted in said channel for longitudinal movement therein, said roller support member having a bottom wall overlying said lift bar, a plurality of load supporting rollers mounted for rotation on and extending upwardly from said roller support member, second elevator ramp means on said bottom wall of said roller support, said second elevator ramp means having a second ramp face which extends parallel to said first ramp face in a face-to-face relationship therewith, drive means for driving the lift bar to and fro with respect to the base member to cause said first and second ramp faces to slide over one another to raise or lower the roller support member and its associated rollers as required in use.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be more clearly understood after reference to the following detailed specification read in conjunction with the drawings wherein;
FIG. 1 is a pictorial view illustrating a van having roller conveyors of the type of the present invention mounted in the floor thereof,
FIG. 2 is a pictorial view of a roller conveyor assembly constructed in accordance with an embodiment of the present invention,
FIG. 3 is an exploded view of the assembly of FIG. 2, and
FIG. 4 is a partially sectioned side view of a portion of a roller assembly.
With reference to the drawings, the reference numeral 10 refers generally to a roller assembly constructed in accordance with an embodiment of the present invention. As indicated in FIG. 1 of the drawings, the roller assemblies 10 may be positioned on the floor 12 of a van 14 for use in transporting loads into and out of the van.
As shown in FIG. 3 of the drawings, the roller assembly has a base channel member 16 which has a bottom wall 18, a pair of oppositely disposed side walls 20 and flanges 22 which project laterally inwardly from the upper end of the side walls 20. A passage 24 opens through the bottom wall 18.
A lifting bar 26 is proportioned to fit in the channel 28 so as to rest in a face-to-face sliding relationship on the bottom wall 18 for longitudinal movement relative to the base member 16.
A plurality of first elevator ramps 30 are mounted on the upper face of the lifting bar 26. The ramps 30 each have a ramp face 32 which is inclined upwardly toward one end of the lift bar.
A roller support member 34 is provided in the form of a U-shaped channel member 36 in which rollers 38 are mounted for rotation so that an arcuate portion of the periphery of each roller 38 will project above the upper edges 40 to the channel member 36. A plurality of second elevator ramps 42 are mounted on the underside of the channel member 36. Each of the ramp members 42 has a second ramp face 44 which extends parallel to the first ramp face 32 of the first ramp members 30. The roller support member 34 with the second elevator ramps 42 attached thereto is mounted in the channel 28 so that the second ramp members 42 rest on the lift bar with the ramp faces 44 arranged in a face-to-face relationship with respect to the ramp faces 32.
A cover 46 is formed with a plurality of apertures 48 in the upper wall 50. The cover 46 has short side walls 52 which extend downwardly from the top wall and are arranged to overlie the side walls 20 of the face member 16. The apertures 48 are proportioned to permit a segment of each roller 38 to project upwardly therethrough when the roller support member or cage 34 is elevated.
Opposite ends of the base member 18 are closed by end plates 54 which are releaseably attached to the flanges 56 which project laterally from opposite sides of the base member 16.
The drive mechanism which is used for moving the lift bar 26 comprises an extensible ram assembly 60 which includes a cylinder 62 and a shaft 64. One end of the cylinder 62 is connected to a mounting bracket 66 which is attached to the underside of the bottom wall 18 of the base member 16. The shaft 64 is mounted in a bracket 68 which is attached to the underside of the lift bar 26.
By extending the ram 60, the shaft 64 will move the bracket 68 to the right of the position shown in FIG. 4 and will thus cause the lift bar 26 to move to the right. As a result, the ramp member 30 will move to the right. This will cause the ramp member 42 to be elevated and this in turn will cause the roller support member 34 to be elevated. By elevating the roller support member 34, the rollers 38 will be caused to project through the passages 48 to extend above the top face of the upper wall 50 so that they may be used for the purposes of providing a roller conveyor along which items may be conveyed into and out of the load storage compartment of the truck or the like.
When the roller conveyor system is not required, the extensible ram 60 is reactivated to return the lift bar to the original position shown in FIG. 4 and the rollers 36 are lowered to the level of the upper face of the cover 50 so that they are not functional as a conveyor.
From the foregoing, it will be apparent that the present invention provides a simple and inexpensive form of elevatoring roller track assembly which does not require an inflatable bladder.
With the exception of the elevator ramp members, the roller track assembly is preferably made from metal such as steel or the like. The elevator ramp pads are preferably made from a wear-resistant, low-friction plastics material such as nylon or Teflar.

Claims (1)

I claim:
1. A self-contained elevating roller track assembly comprising;
(a) a base member having first and second ends, a longitudinally elongated channel formed in said base member, said channel having a bottom wall, a pair of oppositely disposed side walls and an open upper end, a passage opening through said bottom wall,
(b) a lift bar located in said channel and slidably mounted on said bottom wall for longitudinal movement relative to the base member, a mounting bracket attached to the lift bar and extending through the passage formed in the bottom wall of the base member,
(c) first elevator ramp means on said lift bar, said first ramp means having a first ramp face which is inclined upwardly toward the first end of the base member,
(d) a roller support member slidably mounted in said channel for longitudinal movement therein, said roller support member having a bottom wall overlying said lift bar,
(e) a plurality of load supporting rollers mounted for rotation on and extending upwardly from said roller support member,
(f) second elevator ramp means on said bottom wall of said roller support, said second elevator ramp means having a second ramp face which extends parallel to said first ramp face in a face-to-face relationship therewith,
(g) drive means for driving the lift bar to and fro with respect to the base member to cause said first and second ramp faces to slide over one another to raise or lower the roller support member and its associated rollers as required in use said drive means comprising an extensible ram which has first and second ends, said ram being extensible to move the second end with respect to the first end, the extensible ram being located below the base member, the first end of said ram being mounted on said base member and said second end being mounted on said mounting bracket of said lift bar.
US07/274,961 1988-11-22 1988-11-22 Roller track assembly incorporating a mechanical elevator mechanism Expired - Fee Related US4930612A (en)

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US07/274,961 US4930612A (en) 1988-11-22 1988-11-22 Roller track assembly incorporating a mechanical elevator mechanism
CA002003548A CA2003548C (en) 1988-11-22 1989-11-21 Roller track assembly incorporating a mechanical elevator mechanism

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5088585A (en) * 1990-07-17 1992-02-18 Lambert William S Retractable roller ball cargo floor surface
DE4233082A1 (en) * 1992-10-01 1994-04-07 Erwin Jenkner Roller table, especially for the angular transfer of plate-shaped materials
US5452790A (en) * 1994-06-10 1995-09-26 Ak Steel Corporation Mounting system for a roller table
DE19639097A1 (en) * 1996-09-24 1998-03-26 Popp Maya Marina Conveyor using array of balls or rollers
US5915515A (en) * 1996-08-05 1999-06-29 Blair; Rodney L. Die lifting mechanism
US6051133A (en) * 1997-05-28 2000-04-18 Telair International Gmbh Installation apparatus for a roller drive unit
US6193043B1 (en) * 1999-05-17 2001-02-27 Ancra International Llc Retractable roller system for handling cargo
FR2845980A1 (en) * 2002-10-21 2004-04-23 Rotobloc Rolling device for horizontal displacement of load comprises horizontal table on which balls are mounted surmounted by grille with openings opposite balls, handle coupled to grille enabling horizontal displacement
US20040154907A1 (en) * 2002-12-16 2004-08-12 Trw Automotive U.S. Llc Electrical switch assembly
US20040247422A1 (en) * 2002-06-15 2004-12-09 Neumann Kenneth M. Cargo roller system for cargo handling
EP1792855A1 (en) * 2005-12-05 2007-06-06 Joloda (International) Ltd Debris cap for roller-way conveyor
EP1935782A1 (en) * 2006-12-21 2008-06-25 Telair International GmbH Mounting layer for mounting loading devices on the loading deck of an aircraft
US20100016136A1 (en) * 2008-07-17 2010-01-21 Oerlikon Solar Ip Ag, Trubbach Cover for a roller
US20100021258A1 (en) * 2008-07-25 2010-01-28 Hyungjae Industry Co., Ltd. Air roll unit for container car
GB2463661A (en) * 2008-09-18 2010-03-24 Joloda Roller Bed
US20120315117A1 (en) * 2011-06-07 2012-12-13 Crown Equipment Corporation Battery transfer apparatus
US8657553B1 (en) * 2011-04-04 2014-02-25 Stephen S. Rasmussen Roller track loading device
US20160264385A1 (en) * 2015-03-10 2016-09-15 Roy C. Burrow Convertible pallet jack with rollers
US20170154696A1 (en) * 2015-11-30 2017-06-01 Areva Inc. Canister movement assembly for transfer, rotation, and/or inspection
CN113291646A (en) * 2020-09-14 2021-08-24 陈东波 Container structure easy for hoisting and positioning heavy goods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2057367A (en) * 1936-04-25 1936-10-13 Surface Combustion Corp Walking beam furnace
GB481359A (en) * 1937-08-24 1938-03-10 Alfred Spink Improvements relating to vehicle fittings for manipulating loads
US3168205A (en) * 1963-03-08 1965-02-02 Green Sherwood Mobile platform incorporating elevationally adjustable conveyor
US4089399A (en) * 1976-07-06 1978-05-16 Hydraroll Limited Mechanical handling apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2057367A (en) * 1936-04-25 1936-10-13 Surface Combustion Corp Walking beam furnace
GB481359A (en) * 1937-08-24 1938-03-10 Alfred Spink Improvements relating to vehicle fittings for manipulating loads
US3168205A (en) * 1963-03-08 1965-02-02 Green Sherwood Mobile platform incorporating elevationally adjustable conveyor
US4089399A (en) * 1976-07-06 1978-05-16 Hydraroll Limited Mechanical handling apparatus

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5088585A (en) * 1990-07-17 1992-02-18 Lambert William S Retractable roller ball cargo floor surface
EP0547268A1 (en) * 1990-07-17 1993-06-23 William Stephen Lambert Cargo floor with retractable rolling elements
DE4233082A1 (en) * 1992-10-01 1994-04-07 Erwin Jenkner Roller table, especially for the angular transfer of plate-shaped materials
US5452790A (en) * 1994-06-10 1995-09-26 Ak Steel Corporation Mounting system for a roller table
US5915515A (en) * 1996-08-05 1999-06-29 Blair; Rodney L. Die lifting mechanism
DE19639097A1 (en) * 1996-09-24 1998-03-26 Popp Maya Marina Conveyor using array of balls or rollers
EP0881144B1 (en) * 1997-05-28 2003-03-19 Telair International GmbH Mounting device for roller-driving unit
US6051133A (en) * 1997-05-28 2000-04-18 Telair International Gmbh Installation apparatus for a roller drive unit
US6193043B1 (en) * 1999-05-17 2001-02-27 Ancra International Llc Retractable roller system for handling cargo
US20040247422A1 (en) * 2002-06-15 2004-12-09 Neumann Kenneth M. Cargo roller system for cargo handling
FR2845980A1 (en) * 2002-10-21 2004-04-23 Rotobloc Rolling device for horizontal displacement of load comprises horizontal table on which balls are mounted surmounted by grille with openings opposite balls, handle coupled to grille enabling horizontal displacement
WO2004037704A1 (en) * 2002-10-21 2004-05-06 Rotobloc S.A.R.L. Roller track device for moving a load in a substantially horizontal plane
WO2004037687A1 (en) * 2002-10-21 2004-05-06 Rotobloc S.A.R.L. Load handling platform provided with retractable rollers
US20060054452A1 (en) * 2002-10-21 2006-03-16 Pierre Marcelli Load handling platform provided with retractable rollers
US20060054453A1 (en) * 2002-10-21 2006-03-16 Pierre Marcelli Roller track device for moving a load in a substantially horizontal plane
US7237667B2 (en) 2002-10-21 2007-07-03 Rotobloc S.A.R.L. Load handling platform provided with retractable rollers
US20040154907A1 (en) * 2002-12-16 2004-08-12 Trw Automotive U.S. Llc Electrical switch assembly
US7030325B2 (en) 2002-12-16 2006-04-18 Trw Automotive U.S. Llc Electrical switch assembly
US20070131516A1 (en) * 2005-12-05 2007-06-14 Thomas Kordel Debris cap for roller-way conveyors
EP1792855A1 (en) * 2005-12-05 2007-06-06 Joloda (International) Ltd Debris cap for roller-way conveyor
EP1935782A1 (en) * 2006-12-21 2008-06-25 Telair International GmbH Mounting layer for mounting loading devices on the loading deck of an aircraft
US20100264267A1 (en) * 2006-12-21 2010-10-21 Christoph Barauke Fixing rail for attaching loading devices to the loading deck of an aircraft
US8286913B2 (en) 2006-12-21 2012-10-16 Telair International Gmbh Fixing rail for attaching loading devices to the loading deck of an aircraft
US20100016136A1 (en) * 2008-07-17 2010-01-21 Oerlikon Solar Ip Ag, Trubbach Cover for a roller
US8826851B2 (en) * 2008-07-17 2014-09-09 Oberlikon Solar AG, Trubbach Cover for a roller
US20100021258A1 (en) * 2008-07-25 2010-01-28 Hyungjae Industry Co., Ltd. Air roll unit for container car
GB2463661A (en) * 2008-09-18 2010-03-24 Joloda Roller Bed
US8657553B1 (en) * 2011-04-04 2014-02-25 Stephen S. Rasmussen Roller track loading device
US20120315117A1 (en) * 2011-06-07 2012-12-13 Crown Equipment Corporation Battery transfer apparatus
US9850114B2 (en) * 2011-06-07 2017-12-26 Crown Equipment Corporation Battery transfer apparatus
US20160264385A1 (en) * 2015-03-10 2016-09-15 Roy C. Burrow Convertible pallet jack with rollers
US10099856B2 (en) * 2015-03-10 2018-10-16 Roy C. Burrow Convertible pallet jack with rollers
US20180370730A1 (en) * 2015-03-10 2018-12-27 Roy C. Burrow Convertible pallet jack with rollers
US20170154696A1 (en) * 2015-11-30 2017-06-01 Areva Inc. Canister movement assembly for transfer, rotation, and/or inspection
ES2673402R1 (en) * 2015-11-30 2018-10-30 Tn Americas Llc MOUNT DEPOSIT MOVEMENT FOR TRANSFER, ROTATION AND / OR INSPECTION
US10504632B2 (en) * 2015-11-30 2019-12-10 Tn Americas Llc Canister movement assembly for transfer, rotation, and/or inspection
CN113291646A (en) * 2020-09-14 2021-08-24 陈东波 Container structure easy for hoisting and positioning heavy goods

Also Published As

Publication number Publication date
CA2003548A1 (en) 1990-05-22
CA2003548C (en) 1993-04-27

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Owner name: ATLANTIS TRANSPORTATION SERVICES INC., 1000 STEVEN

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Owner name: ATLANTIS TRANSPORTATION SERVICES INC., ONTARIO

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Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362